Just because CV kicks off in less than two days, that doesn't mean there isn't more to be announced. Check out the announcement from Starwars.com:

"Hasbro will be hosting the Galactic Swap Meet at the Hasbro booth at Celebration V! Bring your surplus Build-a-Droid parts and trade with them, and other fans, as their booth becomes the hub for some serious droid-part-swapping!

Hasbro will have a limited supply of complete parts available for 14 of the buildable droids from the Legacy/Droid Factory basic figure line (see attached poster for exact droids they will have). Just bring your extra Legacy/Droid Factory parts and trade them 1-for-1 for parts you need to complete your unfinished droids.

Even if you don't see the droids for which you need parts on the list, bring what you have anyway...there's always a chance that another fan will have what you need.

To ensure that as many people as possible can complete their droids, Hasbro asks that only two Droid pieces be exchanged per person per day.